# Rotation around simulated registration point?

**URL:** <https://forum.kirupa.com/t/rotation-around-simulated-registration-point/93484>\
**Category:** Uncategorized\
**Created:** [October 31, 2003, 4:39pm UTC](https://forum.kirupa.com/t/rotation-around-simulated-registration-point/93484 "2003-10-31T16:39:42Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Spankevelli](https://avatars.discourse-cdn.com/v4/letter/s/4491bb/32.png) [@Spankevelli](https://forum.kirupa.com/u/Spankevelli)\
**Post date:** [October 31, 2003, 4:39pm UTC](https://forum.kirupa.com/t/rotation-around-simulated-registration-point/93484/1 "2003-10-31T16:39:42Z")

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Hi, I want to have arm movement such as the forearm rotating about the arm where the elbow should be the problem is the registration point is at the shoulder for arm. I want the forearms registration to be constantly equal to a simulated registration point where the elbow should be as the arms registration point would be at the shoulder. I need to do it WITHOUT NESTING(a movieclip within another) is it possible.

i tried useing a constant distant between the two clips but it doesnt work. dont know I I have to use trigonometry or not

_I’m actually trying to do this in Director,so nesting wouldnt work_

I think in brief what I trying to accomplish is  
onEnterFrame=function(){

arm.\_x=shoulder.\_x  
arm.\_y=shoulder.\_y

------------------problem----------------------------------  
arm.\_x=simulated\_x(where elbow would be)  
arm.\_y=simulated\_y(where elbow would be)  
}

Thanx, sorry for any spelling mistakes